Justin Theroux on why his relationship with Jennifer Aniston works

Justin Theroux has opened up about his marriage to Jennifer Aniston , following their one-year wedding anniversary in August.

The 45-year-old actor, who stars alongside Emily Blunt in the new thriller [link href='https://www.marieclaire.com/culture/a21616/emily-blunt-girl-on-the-train-official-trailer/' target='_blank' link_updater_label='external_hearst']The Girl on the Train

, discussed his relationship in an interview with Entertainment Tonight on Monday.

The secret to conjugal happiness? It's all down to laughter and mutual respect.

Theroux and Aniston pictured together in New York, September 2016

"We appreciate each other's sense of humor, we respect one another and we get along," he said. "I know it sounds simple but it's true."

Aniston also shares this view, revealing in March that what she loves the most about her husband is his ability to make her chuckle.

"I'm lucky because Justin is the funniest person I've met, and we make each other laugh," Aniston told US Harper's Bazaar. Despite their celebrity status, she added that they remain relatively down-to-earth.

"Married life is so normal and fun and not much different," Aniston said. "We felt married for so long."

The pair tied the knot in a secret ceremony in Los Angeles on 5 August 2015.